pt.cc

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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1996-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
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////////////////////////////////////////////////////////////////////////
 
#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif
 
#include <sstream>
#include <string>
 
#include "interpreter.h"
#include "ov-fcn.h"
#include "pt.h"
#include "pt-eval.h"
#include "pt-pr-code.h"
#include "unwind-prot.h"
 
namespace octave
{
  // Hide the details of the string buffer so that we are less likely to
  // create a memory leak.
 
  std::string
  tree::str_print_code (void)
  {
    std::ostringstream buf;
 
    tree_print_code tpc (buf);
 
    accept (tpc);
 
    std::string retval = buf.str ();
 
    return retval;
  }
 
  // Is the current breakpoint condition met?
 
  bool
  tree::meets_bp_condition (tree_evaluator& tw) const
  {
    bool retval;
    if (m_bp_cond == nullptr)
      retval = false;
    else if (m_bp_cond->empty ())     // empty condition always met
      retval = true;
    else
      {
        int parse_status = 0;
 
        unwind_protect frame;
 
        interpreter_try (frame);
 
        retval = true;                // default to stopping if any error
        try
          {
            octave_value_list val
              = tw.eval_string (*m_bp_cond, 1, parse_status, 1);
 
            if (parse_status == 0)
              {
                if (! val(0).is_scalar_type ())
                  warning ("Breakpoint condition must be a scalar, not size %s",
                           val(0).dims ().str ('x').c_str ());
                else
                  retval = val(0).bool_value ();
              }
            else
              warning ("Error parsing breakpoint condition");
          }
        catch (const execution_exception& e)
          {
            interpreter& interp = tw.get_interpreter ();
 
            interp.recover_from_exception ();
 
            std::string tmp = e.message ();
 
            warning ("Error evaluating breakpoint condition:\n    %s",
                     tmp.c_str ());
          }
      }
 
    return retval;
  }
}